UILabel auto resize on basis of text to be shown

Question

The sizeToFit method worked just great.

I did following.

UILabel *testLabel =[[UILabel alloc] initWithFrame:CGRectMake(6,3, 262,20 )]; // RectMake(xPos,yPos,Max Width I want, is just a container value);

NSString * test=@"this is test this is test inthis is test ininthis is test inthis is test inthis is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...";

testLabel.text = test;
testLabel.numberOfLines = 0; //will wrap text in new line
[testLabel sizeToFit];

[self.view addSubview:testLabel];

You can find a text size with :

CGSize textSize = [[myObject getALongText] 
                    sizeWithFont:[UIFont boldSystemFontOfSize:15] 
                    constrainedToSize:CGSizeMake(maxWidth, 2000)
                    lineBreakMode:UILineBreakModeWordWrap];

then you can create your UILabel like that :

UILabel * lbl = [[UILabel alloc] initWithFrame:CGRectMake(0,0,textSize.width, textSize.height];
[lbl setNumberOfLines:0];
[lbl setLineBreakMode:UILineBreakModeWordWrap];
[lbl setText:[myObject getALongText]];

In Swift:

testLabel = UILabel(frame: CGRectMake(6, 3, 262, 20))
testLabel.text = test
testLabel.numberOfLines = 0
testLabel.sizeToFit()

In Objective C

UILabel *testLabel = [[UILabel alloc] initWithFrame: CGRectMake(6, 3, 262, 20)]];
testLabel.text = test;
testLabel.numberOfLines = 0;
[testLabel sizeToFit];

If you want to resize the UILabel only in height, use this:

@property (nonatomic, weak) IBOutlet UILabel *titleLabel;

CGRect titleLabelBounds = self.titleLabel.bounds;
titleLabelBounds.size.height = CGFLOAT_MAX;
// Change limitedToNumberOfLines to your preferred limit (0 for no limit)
CGRect minimumTextRect = [self.titleLabel textRectForBounds:titleLabelBounds limitedToNumberOfLines:2];

CGFloat titleLabelHeightDelta = minimumTextRect.size.height - self.titleLabel.frame.size.height;
CGRect titleFrame = self.titleLabel.frame;
titleFrame.size.height += titleLabelHeightDelta;
self.titleLabel.frame = titleFrame;

Now you can use titleLabelHeightDelta to layout other views depending on your label size (without using autolayout).

I'm not sure I totally understand the question, but you can use the sizeToFit method on a UILabel (the method is inherited from UIView) to change the size according to the label text.